"Solar" is a musical composition attributed to Miles Davis on the studio album Walkin', considered a modern jazz standard. There is disagreement concerning the exact pronunciation of the tune (|?sol?r| or |?solar|).

a period of time (4 or 2 hours) during which some of a ship's crew are on duty

Secretly follow or spy on

Look at or observe attentively, typically over a period of time

Keep under careful or protective observation

a small portable timepiece

Two minutes...

Playing about with shutter speeds and macro settings. Shot over 2 minutes in the dark to pick out the glowing hands and movement - with a few seconds burst on a torch to bring out some of the detail (Casio AWG-101 G-Shock)